Now here's where I get lost - AFAIK, the ipod (and itunes) do not support Replay Gain (they use a slightly different algorithm called Sound Check). So, in theory, you should not be hearing any difference in volume after using MP3Gain!

Well that is really strange.

I definitely hear a difference - all the songs are closer in volume. But even if my ears are playing tricks on me, the change in volume is being read (or processed or whatever) by both itunes and the ipod. Most songs come in in the high 90 db range, and i have the program set to reduce volume to 90 db. And the songs are definitely quieter after runnning the program.

Hmmm...well, it's not that big of a deal, as it does a decent job. I'm just looking for something that can tweak it a little more.